70 SUDDEN EISE OF TEMPERATURE. Chap. IV. 



to S.S.W. It appears to have been a revolving 

 storm, moving to the N.W. Yesterday, as the 

 wind approached S.E., the temperature rose to 

 + 32°; the upper deck sloppy; the lower deck 

 temperature during Divine Service was 75° ! ! 

 As the wind veered round to the S.S.W., the 

 wind moderated, and temperature fell ; this 

 evening it is — 7°. How is it that the S.E. 

 wind has brought us such a very high tempe- 

 rature ? Even if it traversed an unfrozen sea it 

 could not have derived from thence a higher 

 temperature than 29°. Has it swept across 

 Greenland — that vast superficies partly en- 

 veloped in glacier, partly in snow ? No, it 

 must have been borne in the higher regions of 

 the atmosphere from the far south, in order to 

 mitigate the severity of this northern climate. 



Petersen tells me the same warm S.E. wind 

 suddenly sweeps over Upernivik in midwinter, 

 bringing with it abundance of rain ; and that it 

 always shifts to the S.W., and then the tempera- 

 ture rapidly falls : this is precisely the change 

 we have experienced in lat. 75°. I believe a 

 somewhat similar, but less remarkable, change 

 of temperature was noticed in Smith's Sound, 

 lat. 781° N. 



2bth. — Mild, " Madeira weather," as Hobson 

 calls it, temperature up to + 7°. By my desire 



